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http://dx.doi.org/10.7776/ASK.2006.25.8.395

Effects of Wind-Generated Bubbles on Sound Propagation  

Lee, Won-Byoung (한양대학교 해양환경과학과 해양음향연구실)
Kim, Young-Shin (한양대학교 해양환경과학과 해양음향연구실)
Joo, Jong-Min (한양대학교 해양환경과학과 해양음향연구실)
Lee, Chang-Won (한양대학교 해양환경과학과 해양음향연구실)
Na, Jung-Yul (한양대학교 해양환경과학과 해양음향연구실)
Publication Information
The Journal of the Acoustical Society of Korea / v.25, no.8, 2006 , pp. 395-402 More about this Journal
Abstract
When an active SONAR works in the subsurface. its detection Performance is limited by the reverberation. The winds Play a primary role in the Production of bubbles in the ocean. And the bubbles as efficient scatters contribute to the reverberant field. In this Paper the effects of wind-generated bubbles on sound propagation in the subsurface are investigated as a mid-frequency Hull-mounted SONAR works. The active signal excess is calculated at source depths 3. 5. and 10m considering bubble layer for frequencies 5. 7.5, and 10kHz. The change of the near-surface sound speed tend to increase surface reverberation levels and change the active signal excess. In the 10m/s winds. the maximum detection range reduces over 3km through the near-surface . The reason is the upper refraction due to the wind-generated bubbles.
Keywords
Wind-generated bubble; bubble effect; Sonar detection performance; Maximum detection range;
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